Victoria Holt has some basics on Splunk:
Splunk, a software platform, has the capability to leverage machine data for data management and analytics. It can be used for
- Data driven decision making
- Alerts for network security threats
- Report on system failures
- Analyse and improve functionality
It enables performance analysis, dashboard creation, monitoring, troubleshooting and investigation of the real-time data collected. A Edureka learning video showed the Splunk components.
Advanced Splunk queries are still a bit like magic to me, but this is a very powerful service once you get a handle on how it works.